Metallic screen frame



June 1 1926.

. 4 A. w. SANDELIN METALLIC SCREEN FRAME Filed May 27,

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ALFRED W. SANDELIN, 0F MINNEAPOLIS, IVIINNESOTA.

METALLIC SCREEN FRAME.

Application filed May 27, 1925. Serial No. 33,180.

My invention has for its object to provide a simple, strong, and highly efficient metallic screen frame, and to this end it consists of the novel devices and combinations of devices hereinafter described and defined in the claims.

In the accompanying drawings, which illustrate the invention, like characters indicate like parts throughout the several views.

Referring to the drawings:

Fig. l is an outside view of the metallic screen frame with ascreen secured therein; and

Fig. 2 is a detail view in transverse section taken on the line 22 of Fig. 1, on an enlarged scale.

The numeral 3 indicates a rectangular metallic screen frame in which a screen 4 is secured by a moulding 5. Each member of the frame 3 is in the form of an angle bar, the face flange of which is indicated by the numeral 6 and the edge flange of which is indicated by the numeral 7. These members of the frame 3, at the corners of said frame, are overlapped and rigidly connected by welding, rivets or any other suitable means. The inner edge portion of each face flange 6 is obliquely bent toward the back of the frame 3 to afford a clamping flange 8.

The moulding 5 is made up of independent vertical and horizontal members, each of which is in the form of an angle bar in nested arrangement in respect to the respective portion of the frame 3. The face and edge flanges of the moulding 5 are indicated by the numerals 9 and 10, respectively, the former of which overlap the face flanges 6 and the latter of which overlap the edge flanges 7 and between which the screen 4: extends.

The inner edge portions of the moulding 5 are bent obliquely toward the back of the screen 3 to afford combined screen-clamping and stretching flanges 11 which co-operate with the flanges 8 to hold the screen 4L- therebetween and stretch the same. The moulding 5 is adjustably secured to the frame 3 by a plurality of screws 12 loosely inserted through bores in the moulding flanges 9 and have threaded engagement with tapped bores in the face flanges 6.

As shown, the ends of the horizontal mem bers of the moulding 5 are cut square and the ends of the vertical members thereof are mitered, overlap the ends of said horizontal members, and assist in holding the same in position.

A. frame extension 13, the members of which are channel-shaped in cross section, is formed with the edge flanges 7 and extends back of the frame proper. The back flanges of the frame extension 13 are bent obliquely toward the front of the frame 3 to afford reinforcing flanges 14. The frame extension 13 is ofsuch size as to fit within the casing of a window to which it is to be applied. Any suitable means may be used in securing the screen frame in position in a window frame.

In attaching the screen 4- in the frame 3, the same, which is of substantially the correct size, is laid on the face flanges 6 and then its marginal portion is bent ontothe edge flanges 7. The members of the moulding 5 are then laid, one at a time, on the screen 4 over the frame 3 and secured by the screws 12. When the moulding 5 is thus applied, the screen f is securely held be tween the co-operating edge flanges 7 and 10 and between the co-operating flanges 8 and 11. As the moulding 5 is clamped onto the frame 3 by the screws 12, the screen 4 is held between the edge flanges 7 and 8 and at the same time the oblique flanges 11 engage said screen and press the same to- ,ward the back of the frame 3 and thereby stretch the screen and hold the same smooth and tight. Each member of the frame 3 and frame extension 13 is formed from a single sheet of folded metal.

The above described screen frame, while extremely light, is strong, durable, and has a neat and finished appearance, and a new screen may be easily and quickly substituted for the screen 4twhen worn out.

What I claim is:

1. A metallic screen frame having a displaceable screen-attaching molding, said frame and molding having at their inner edges co-operating inturned oblique flanges, a screen having its'marginal edge'portion inserted between the frame and molding and clamped between the outer edge portions thereof and drawn over the frame, the oblique inturned flange of the molding being in engagement with the screen, holding the molding spaced outward of the screen on the frame and pressing the screen inward against the oblique flange of the frame and placing the same under tension by offsetting its body portion inward in respect to the frame, and fastening means for securing the molding" to the frame.

2. A metallic screen frame having a displaceable screennttaching molding, said frame and molding being in the form of angle bars in nested arrangement and afford ing co-operating face flanges and co-operating side flanges, said frame and molding having at the inner edges of their face flanges co-operating intnrned oblique; flanges, a screen having its marginal edge portion inserted between the frame and molding, said screen being clamped between said side flanges and drawn over the face flange of the frame, the oblique inturned flange of the molding being in engagement with the screen and holding the face flange of the molding spaced outward of the screen on the face flange of the frame and pressing the screen inward against the oblique flange of the frame and placing the same under tension by ofisetting its body portion inward in respect to the face flange of the frame, and fastening means for securing the molding to the frame;

3. The structure defined in claim 1 in whic-hsaid fastening means are adjustable and connect the face flange of the molding to the frame.

The structure defined in claim 1 in which the side flange of the fran'ie has formedtherewith a frame extension that is channel-shaped in cross section with its flanges extending parallel to the face flange of the frame.

In testimony whereof I aflix my signature.

ALFRED \V. SANDELIN. 

